The effect of carbon nanotube orientation and content on the mechanical properties of polypropylene based composites |
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| Affiliation: | 1. Department of Chemical Engineering, Université Laval, Quebec City G1V 0A6, Canada;2. School of Civil Engineering and Architecture, Guangxi University of Science and Technology, Liuzhou City 545006, China;1. Department of Vascular Surgery and Kidney Transplantation, Hôpitaux Universitaires de Strasbourg, Geprovas, Strasbourg, France;2. Laboratoire de Physique et Mecanique Textiles, Université de Haute-Alsace, Mulhouse, France;3. Department of Physiology, Hôpitaux Universitaires de Strasbourg, Strasbourg, France;1. School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China;2. School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing, Jiangsu 210009, China;1. State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, China;2. School of Transportation and Logistics Engineering, Wuhan University of Technology, Wuhan, China;3. Faculty of Engineering, China University of Geosciences, Wuhan, China;1. Collaborative Research Center 814 – Additive Manufacturing (CRC 814), Am Weichselgarten 9, 91058 Erlangen, Germany;2. Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Institute of Polymer Technology, Am Weichselgarten 9, 91058 Erlangen, Germany |
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| Abstract: | Finite element method (FEM) is used to predict the tensile and compressive stress–strain curves of single wall carbon nanotube (SWCNT) reinforced polypropylene (PP) composites. The numerical simulations, using shell and tetrahedron elements, are first carried out to investigate the effect of SWCNT orientation on the mechanical properties of the nano-composites. Second, the Grunfest–Young constitutive equation is selected to determine the effect of strain rate and solve the finite element program to analyze the mechanical behavior of the nano-composites. Third, the effect of SWCNT volume fraction is studied. In all cases, the shear and normal stresses distribution along the nanotube axis are investigated and compared with the macroscopic tensile or compressive stresses on the composites. At the same time, the stresses of the interface between SWCNT and the matrix along the loading direction are analyzed. Finally, the effects of SWCNT orientation, content and strain rate on the strength of the nano-composites are studied. From the results obtained, it was shown that strain rate can substantially affect the tensile and shear stresses of the composites, but do not significantly influence the initial tensile or compressive elastic moduli. This is especially the case for SWCNT orientation angles less than 30° and volume fractions higher than 0.74%. |
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| Keywords: | Single wall carbon nanotube Polypropylene Mechanical properties |
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